Characterization of tetraethylene glycol passivated iron nanoparticles

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dc.contributor.authorNunes, Eloiza da Silva [UNESP]
dc.contributor.authorViali, Wesley Renato [UNESP]
dc.contributor.authorSilva, Sebastiao William da
dc.contributor.authorHuamani Coaquira, Jose Antonio
dc.contributor.authorGarg, Vijayendra Kumar
dc.contributor.authorOliveira, Aderbal Carlos de
dc.contributor.authorMorais, Paulo Cesar
dc.contributor.authorJafelicci Júnior, Miguel [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de Brasília (UnB)
dc.contributor.institutionHuazhong Univ Sci & Technol
dc.date.accessioned2015-03-18T15:53:17Z
dc.date.available2015-03-18T15:53:17Z
dc.date.issued2014-10-01
dc.description.abstractThe present study describes the synthesis and characterization of iron@iron oxide nanoparticles produced by passivation of metallic iron in tetraethylene glycol media. Structural and chemical characterizations were performed using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Mossbauer spectroscopy. Pomegranate-like core@shell nanoparticulate material in the size range of 90-120 nm was obtained. According to quantitative phase analysis using Rietveld structure refinement the synthesized iron oxide was identified as magnetite (Fe3O4) whereas the iron to magnetite mass fractions was found to be 47:53. These findings are in good agreement with the data obtained from Mossbauer and thermal gravimetric analysis (TGA). The XPS data revealed the presence of a surface organic layer with higher hydrocarbon content, possibly due to the tetraethylene glycol thermal degradation correlated with iron oxidation. The room-temperature (300K) saturation magnetization measured for the as-synthesized iron and for the iron-iron oxide were 145 emu g-1 and 131 emu g-1, respectively. The measured saturation magnetizations are in good agreement with data obtained from TEM, XRD and Mossbauer spectroscopy. (C) 2014 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Quim, Dept Quim Fis, Lab Mat Magnet & Coloides, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniv Brasilia, Inst Fis, Nucleo Fis Aplicada, BR-70910900 Brasilia, DF, Brazil
dc.description.affiliationHuazhong Univ Sci & Technol, Sch Automat, Wuhan 430074, Peoples R China
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, Dept Quim Fis, Lab Mat Magnet & Coloides, BR-14801970 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 10/20546-0
dc.description.sponsorshipIdCNPq: 142697/2010-9
dc.format.extent337-345
dc.identifierhttp://dx.doi.org/10.1016/j.apsusc.2014.07.154
dc.identifier.citationApplied Surface Science. Amsterdam: Elsevier Science Bv, v. 315, p. 337-345, 2014.
dc.identifier.doi10.1016/j.apsusc.2014.07.154
dc.identifier.issn0169-4332
dc.identifier.lattes7182671143702858
dc.identifier.urihttp://hdl.handle.net/11449/116420
dc.identifier.wosWOS:000342360300048
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofApplied Surface Science
dc.relation.ispartofjcr4.439
dc.relation.ispartofsjr1,093
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectIron@iron oxideen
dc.subjectCore@shellen
dc.subjectMagnetic nanoparticleen
dc.subjectMetallic ironen
dc.subjectNanoparticlesen
dc.subjectPolyolen
dc.titleCharacterization of tetraethylene glycol passivated iron nanoparticlesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes7182671143702858
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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